Performed laparoscopically through keyhole incisions, Roux-en-Y gastric bypass is the gold standard in weight loss surgery in the United States because it results in reliable weight loss with acceptable risks and minimal side effects.
In gastric bypass surgery, the surgeon staples off a large section of the stomach, leaving a tiny pouch. Patients simply can't eat as much as they did before surgery, because this small pouch can only accomodate a few ounces of food at a time, and they subsequently lose weight. Additionally, because most of the stomach and some of the small intestine has been bypassed, some of the nutrients and calories in your foods will not be absorbed.
It is important that patients who have had a gastric bypass procedure make a lifelong commitment to making the necessary changes in their diet. This includes maintaining an adequate intake of protein, taking vitamin and mineral supplements including a multivitamin, B12, iron and calcium, and avoiding sweets and fatty foods.
Estimated weight loss in the first one to two years after a Roux-en-Y gastric bypass is approximately 1/2 to 2/3rd of excess weight. Fifty percent excess weight loss has been documented 10 years and more after gastric bypass.
Risks of Gastric Bypass Surgery
Gastric Bypass Surgery achieves weight loss by decreasing intestinal absorption of food; instead of following its usual path, food bypasses a portion of the stomach and small bowel. In addition to surgical complications, some people experience long-term deficiencies of vitamin B12, folate, and iron. "Dumping syndrome," in which the consumption of sugar causes abdominal cramping and diarrhea, can also occur. Some people will also regain some weight in subsequent years.
Roux-en-Y Gastric Bypass